The No. 1 rule of spring training is to not get too high or too low on individual performances, as the games bear little resemblance to regular season action. That being said, as the Red Sox put up a goose egg on Friday, it was hard not to envision what life could be like without David Ortiz in the lineup. The Red Sox are still optimistic that Ortiz will be ready for Opening Day, but the drama surrounding his ailing Achilles is starting to pick up. The slugger’s status seems to change by the minute, even though it’s been nearly eight months since he first sustained the injury. Ortiz felt soreness after some light running on Thursday, and while he took batting practice on Friday, the decision was ultimately made to keep him off the base paths. Ortiz still has more than three weeks to prepare for Boston’s season opener in the Bronx, so perhaps it’s not time to hit the panic button, but at what point do the Red Sox start figuring out an alternative plan? Manager John Farrell doesn’t seem too concerned yet, as he continues to reiterate that it’s a day-by-day process. The Sox skipper did reveal on Friday, though, that Ortiz is starting to get frustrated with the whole situation, which isn’t a very encouraging sign for Boston. “He’s critically important to our lineup,” Farrell told reporters in Fort Myers on Friday. “He’s aware of that. I think that’s what kind of adds to his frustration — not being able to get on the field and participate in spring training and get ready for the regular season. “But because we haven’t come to that date where, ‘OK, Plan B is now a legitimate one’ … I know those discussions will take place. But we’re still hopeful in taking the approach that he will be ready. But we’ve got to be aware that that may need adjusting.”